Featured Research

from universities, journals, and other organizations

Friends help more promptly, at least in monkeys

Date:
July 31, 2012
Source:
German Primate Center
Summary:
Behavioral scientists have found out that crested macaques react faster if threatened by predators when a group member they share close social bonds with calls for help. In order to study this behavior, the scientists recorded recruiting calls of the monkeys. The macaques utter them, when predators like pythons are in sight.

Crested macaques are grooming other group members in the Indonesian rainforest near the field station Tangkoko.
Credit: Antje Engelhardt / German Primate Center

Behavioral scientists of the German Primate Center cooperating with colleagues of the Universities of Portsmouth and Bogor have found out that crested macaques react faster if threatened by predators when a group member they share close social bonds with calls for help. In order to study this behavior, the scientists led by Antje Engelhardt, head of the junior research group Primate Sexual Selection, recorded recruiting calls of the monkeys. The macaques utter them, when predators like pythons are in sight.

Related Articles


By these calls they attract group members, which cooperatively drive the snake away. Hereafter the scientists replayed the recordings to different individuals of the group in order to document their reactions. Calls of "friends" as well as calls of less close group members were played to the macaques. When they heard calls of befriended monkeys, they reacted substantially faster than to the other calls. The study also sheds light on the evolution of social relationships in humans, the researchers conclude.

Hard to say if the scientists of the junior research group "Primate Sexual Selection" at the DPZ ever imagined they would have to mimic a snake to reach their scientific aims. They probably didn't. But only this way the researchers in Antje Engelhardt's group in the field station Tangkoko in Indonesia were able to study the effect of social bonds on how the macaques react to predators. Holding a life-size model of a python they hid behind a tree and subsequently showed the cardboard-snake to different macaques. Colleagues meanwhile recorded the calls with which the macaques reacted to the sight. Attracted by these "recruiting calls," members of the macaques' group usually join the caller to drive away the predator, in this case the fake snake.

The behavioral scientists tried to find out, whether macaques react differently to calls from socially close group members: The scientists replayed the recorded calls to different individuals of the group, once using the call of a socially close group member, once using the call of a more distant one.

Using video cameras the researchers then recorded the reaction and analyzing these found out: When a socially close macaque sounded the recruiting call, the others reacted more promptly than when the call came from a "non-friend."

"Our results show, that close social bonds which surpass kinship played an important role even before the evolution of the human species," Antje Engelhardt says. "Cooperative defense against predators seems to be one of the benefits within this context."


Story Source:

The above story is based on materials provided by German Primate Center. Note: Materials may be edited for content and length.


Journal Reference:

  1. Micheletta, Jιrτme, Bridget M. Waller, Maria R. Panggur, Christof Neumann, Julie Duboscq, Muhammad Agil and Antje Engelhardt. Social bonds affect anti-predator behaviour in a tolerant species of macaque, Macaca nigra. Proceedings of the Royal Society B, August 1, 2012

Cite This Page:

German Primate Center. "Friends help more promptly, at least in monkeys." ScienceDaily. ScienceDaily, 31 July 2012. <www.sciencedaily.com/releases/2012/07/120731201210.htm>.
German Primate Center. (2012, July 31). Friends help more promptly, at least in monkeys. ScienceDaily. Retrieved January 26, 2015 from www.sciencedaily.com/releases/2012/07/120731201210.htm
German Primate Center. "Friends help more promptly, at least in monkeys." ScienceDaily. www.sciencedaily.com/releases/2012/07/120731201210.htm (accessed January 26, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Monday, January 26, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Florida Might Legalize Black Bear Hunting

Florida Might Legalize Black Bear Hunting

Newsy (Jan. 24, 2015) — A string of black bear attacks has Florida officials considering lifting the ban on hunting the animals to control their population. Video provided by Newsy
Powered by NewsLook.com
Ebola Killing Large Portion Of Ape Population

Ebola Killing Large Portion Of Ape Population

Newsy (Jan. 23, 2015) — Experts estimate Ebola has wiped out one-third of the world&apos;s gorillas and chimpanzees. Video provided by Newsy
Powered by NewsLook.com
Controversy Shrouds Captive Killer Whale in Miami

Controversy Shrouds Captive Killer Whale in Miami

Reuters - Light News Video Online (Jan. 23, 2015) — Activists hope the National Oceanic and Atmospheric Agency (NOAA) will label killer whales endangered, allowing lawyers to sue a Miami aquarium to release an orca into the wild after 44 years. Jillian Kitchener reports. Video provided by Reuters
Powered by NewsLook.com
‘Healthy’ Foods That Surprisingly Pack on Pounds

‘Healthy’ Foods That Surprisingly Pack on Pounds

Buzz60 (Jan. 23, 2015) — Some &apos;healthy&apos; foods are actually fattening. Fitness and nutrition expert John Basedow (@JohnBasedow) shines a light on the sneaky foods like nuts, seeds, granola, trail mix, avocados, guacamole, olive oil, peanut butter, fruit juices and salads that are good for you...but not so much for your waistline. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins